java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AbstractInterpretationC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-11 14:12:12,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-11 14:12:12,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-11 14:12:12,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-11 14:12:12,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-11 14:12:12,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-11 14:12:12,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-11 14:12:12,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-11 14:12:12,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-11 14:12:12,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-11 14:12:12,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-11 14:12:12,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-11 14:12:12,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-11 14:12:12,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-11 14:12:12,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-11 14:12:12,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-11 14:12:12,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-11 14:12:12,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-11 14:12:12,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-11 14:12:12,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-11 14:12:12,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-11 14:12:12,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-11 14:12:12,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-11 14:12:12,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-11 14:12:12,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-11 14:12:12,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-11 14:12:12,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-11 14:12:12,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-11 14:12:12,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-11 14:12:12,136 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-11 14:12:12,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-11 14:12:12,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-11 14:12:12,137 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-11 14:12:12,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-11 14:12:12,137 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-11 14:12:12,138 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-11 14:12:12,138 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-11 14:12:12,141 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-11 14:12:12,141 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-11 14:12:12,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-11 14:12:12,142 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-11 14:12:12,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-11 14:12:12,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-11 14:12:12,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-11 14:12:12,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-11 14:12:12,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-11 14:12:12,144 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-11 14:12:12,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-11 14:12:12,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-11 14:12:12,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-11 14:12:12,146 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-11 14:12:12,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-11 14:12:12,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-11 14:12:12,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-11 14:12:12,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-11 14:12:12,147 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-11 14:12:12,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-11 14:12:12,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-11 14:12:12,148 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-11 14:12:12,194 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-11 14:12:12,213 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-11 14:12:12,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-11 14:12:12,218 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-11 14:12:12,219 INFO L275 PluginConnector]: CDTParser initialized [2019-09-11 14:12:12,219 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-09-11 14:12:12,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9035006b2/ce6e898159094a3fb306b7dcbaaaf690/FLAGd7864e3d1 [2019-09-11 14:12:12,758 INFO L306 CDTParser]: Found 1 translation units. [2019-09-11 14:12:12,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-09-11 14:12:12,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9035006b2/ce6e898159094a3fb306b7dcbaaaf690/FLAGd7864e3d1 [2019-09-11 14:12:13,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9035006b2/ce6e898159094a3fb306b7dcbaaaf690 [2019-09-11 14:12:13,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-11 14:12:13,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-11 14:12:13,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-11 14:12:13,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-11 14:12:13,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-11 14:12:13,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c68dd03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13, skipping insertion in model container [2019-09-11 14:12:13,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,149 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-11 14:12:13,199 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-11 14:12:13,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-11 14:12:13,575 INFO L188 MainTranslator]: Completed pre-run [2019-09-11 14:12:13,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-11 14:12:13,674 INFO L192 MainTranslator]: Completed translation [2019-09-11 14:12:13,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13 WrapperNode [2019-09-11 14:12:13,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-11 14:12:13,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-11 14:12:13,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-11 14:12:13,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-11 14:12:13,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... [2019-09-11 14:12:13,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-11 14:12:13,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-11 14:12:13,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-11 14:12:13,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-11 14:12:13,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 02:12:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-11 14:12:13,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-11 14:12:13,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-11 14:12:13,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-11 14:12:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-11 14:12:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-11 14:12:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-11 14:12:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-11 14:12:13,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-11 14:12:14,609 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-11 14:12:14,609 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-11 14:12:14,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 02:12:14 BoogieIcfgContainer [2019-09-11 14:12:14,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-11 14:12:14,615 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-09-11 14:12:14,615 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-09-11 14:12:14,616 INFO L275 PluginConnector]: Abstract Interpretation initialized [2019-09-11 14:12:14,616 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 02:12:14" (1/1) ... [2019-09-11 14:12:14,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-11 14:12:14,855 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-11 14:14:58,720 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-11 14:14:58,742 INFO L272 AbstractInterpreter]: Visited 217 different actions 1897 times. Merged at 128 different actions 884 times. Widened at 8 different actions 13 times. Performed 5596 root evaluator evaluations with a maximum evaluation depth of 18. Performed 5596 inverse root evaluator evaluations with a maximum inverse evaluation depth of 18. Found 811 fixpoints after 113 different actions. Largest state had 68 variables. [2019-09-11 14:14:58,742 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-09-11 14:14:58,745 INFO L168 Benchmark]: Toolchain (without parser) took 165612.29 ms. Allocated memory was 141.0 MB in the beginning and 405.3 MB in the end (delta: 264.2 MB). Free memory was 87.9 MB in the beginning and 201.1 MB in the end (delta: -113.2 MB). Peak memory consumption was 317.8 MB. Max. memory is 7.1 GB. [2019-09-11 14:14:58,748 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 141.0 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-11 14:14:58,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 541.86 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 87.7 MB in the beginning and 172.3 MB in the end (delta: -84.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2019-09-11 14:14:58,750 INFO L168 Benchmark]: Boogie Preprocessor took 87.61 ms. Allocated memory is still 201.3 MB. Free memory was 172.3 MB in the beginning and 168.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2019-09-11 14:14:58,751 INFO L168 Benchmark]: RCFGBuilder took 850.75 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 117.6 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2019-09-11 14:14:58,752 INFO L168 Benchmark]: Abstract Interpretation took 164127.45 ms. Allocated memory was 201.3 MB in the beginning and 405.3 MB in the end (delta: 203.9 MB). Free memory was 117.0 MB in the beginning and 201.1 MB in the end (delta: -84.1 MB). Peak memory consumption was 286.6 MB. Max. memory is 7.1 GB. [2019-09-11 14:14:58,756 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 141.0 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 541.86 ms. Allocated memory was 141.0 MB in the beginning and 201.3 MB in the end (delta: 60.3 MB). Free memory was 87.7 MB in the beginning and 172.3 MB in the end (delta: -84.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.61 ms. Allocated memory is still 201.3 MB. Free memory was 172.3 MB in the beginning and 168.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 850.75 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 117.6 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 164127.45 ms. Allocated memory was 201.3 MB in the beginning and 405.3 MB in the end (delta: 203.9 MB). Free memory was 117.0 MB in the beginning and 201.1 MB in the end (delta: -84.1 MB). Peak memory consumption was 286.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 569]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: abstract domain could reach this error location. Possible FailurePath: [L5] int m_Protocol = 1; [L6] int m_msg_2 = 2; [L7] int m_recv_ack_2 = 3; [L8] int m_msg_1_1 = 4; [L9] int m_msg_1_2 = 5; [L10] int m_recv_ack_1_1 = 6; [L11] int m_recv_ack_1_2 = 7; [L16] int q = 0; [L17] int method_id; [L20] int this_expect = 0; [L21] int this_buffer_empty = 0; [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND TRUE q == 0 [L44] COND TRUE __VERIFIER_nondet_int() [L48] method_id = 1 [L50] COND FALSE !(0) [L54] q = 1 [L56] this_expect=0 [L56] this_buffer_empty=1 [L24] COND TRUE 1 [L27] int P1=__VERIFIER_nondet_int(); [L28] int P2=__VERIFIER_nondet_int(); [L29] int P3=__VERIFIER_nondet_int(); [L30] int P4=__VERIFIER_nondet_int(); [L31] int P5=__VERIFIER_nondet_int(); [L32] int P6=__VERIFIER_nondet_int(); [L33] int P7=__VERIFIER_nondet_int(); [L34] int P8=__VERIFIER_nondet_int(); [L35] int P9=__VERIFIER_nondet_int(); [L38] COND FALSE !(this_expect > 16) [L43] COND FALSE !(q == 0) [L63] COND TRUE q == 1 [L64] COND TRUE __VERIFIER_nondet_int() [L66] COND TRUE !((P1 % 2) != (0 % 2)) [L68] method_id = 2 [L70] COND TRUE (((((P1 % 2) != (this_expect % 2)) && (this_buffer_empty == 1)) && !((P1 % 2) != (0 % 2))) || ((this_buffer_empty != 1) && !((P1 % 2) != (0 % 2)))) [L569] __VERIFIER_error() RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...